Everest Extreme Performance High Mileage Motor Oils are fully licensed to meet or exceed the latest American Petroleum Institute SN service classification and has been field tested to be comparable to most American, Asian and European manufacturers’ standards including ACEA A1/B1 & A5/B5, Chrysler MS 6395S and Ford WSS M2C945-A, M2C946-A and other specifications where a synthetic blend API SN motor oil is recommended.